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Cement based piezoelectric intelligent composite material and its preparing method

A technology of composite materials and piezoelectric materials, applied in the direction of piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve problems such as poor compatibility, achieve low cost, simple preparation process, and extensive engineering The effect of applied meaning

Inactive Publication Date: 2006-11-22
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention is to overcome the problem of poor compatibility between the above structural materials and piezoelectric materials, so as to better implement online health monitoring and forecasting for many large-scale building structures (such as long-span bridges, high-rise buildings and nuclear buildings, etc.). The present invention uses cement as The matrix is ​​to prepare 0-3 cement-based piezoelectric intelligent composite materials, which have good compatibility with concrete, can greatly reduce the external polarization voltage, and improve the polarization efficiency

Method used

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  • Cement based piezoelectric intelligent composite material and its preparing method
  • Cement based piezoelectric intelligent composite material and its preparing method
  • Cement based piezoelectric intelligent composite material and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] With sulfoaluminate cement as the matrix and lead niobium magnesium zirconate titanate (PMN-PZT) ceramic particles as the functional body, its main properties are shown in Table 1 and Table 2.

[0039] flat machine

electrical coupling

Coefficient

K p

Horizontal machine

electrical coupling

Coefficient

K 31

longitudinal piezo

constant

d 33 / pC·N -1

Dielectric

loss

tanδ

relatively medium

electricity often

ε

Machinery

prime factor

Q m

curievin

Spend

T c / °C

0.66

0.41

550

1.5

3800

55

200

[0040] relative dielectric

Constant εr

Dielectric loss tanδ

Bulk density

/ g / cm 3

Average particle size / μm

8.55

0.067

2.078

17.70

[0041] Since the specific gravity of PMN-PZT and cement is quite different, in order to fully mix P...

Embodiment 2

[0044] Using sulfoaluminate cement as the matrix and lead niobium lithium zirconate titanate [P(ZTNL)] ceramic particles as the functional body, its main properties are shown in Table 2 and Table 4.

[0045] flat machine

electrical coupling

Coefficient

K p

Horizontal machine

electrical coupling

Coefficient

K 31

longitudinal piezo

constant

d 33 / pC·N -1

Dielectric

loss

tanδ

relatively medium

electricity often

ε

Machinery

prime factor

Q m

Curie temperature

T c / ℃

0.65

0.39

400

2

2000

60～70

360

[0046] Since the specific gravity of P(ZTNL) and cement is quite different, in order to fully mix P(ZTNL) and cement, firstly mix P(ZTNL) and cement by ball milling, the mixing time is 30min, the grinding medium is absolute ethanol, and after drying, Sieve and set aside. Add a certain amount of water ...

Embodiment 3

[0049] Ordinary Portland cement is used as the matrix, and lead niobium magnesium zirconate titanate (PMN-PZT) ceramic particles are used as the functional body, and its main properties are shown in Table 6 and Table 1.

[0050] Relative permittivity

Number εr

Dielectric loss

tanδ

Bulk density

/ g / cm 3

The average particle size

/ μm

8.79

0.087

2.017

16.76

[0051] Since the specific gravity of PMN-PZT and cement is quite different, in order to fully mix PMN-PZT and cement, first mix PMN-PZT and cement by ball milling, the mixing time is 30min, the grinding medium is absolute ethanol, and sieve after drying for later use. Add a certain amount of water according to a certain water-cement ratio, and after fully stirring, use the compression molding method to press into a φ15mm×1mm disc with a molding pressure of 60MPa. After curing in a standard curing box (20°C, 100%RH) for 28 days , polish both sides, ...

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PUM

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Abstract

The invention relates to a piezoelectric intelligent composite material, in particular to a 0-3 type cement-based piezoelectric intelligent composite material and their preparation method. Mainly used for intelligent management and control of large buildings. The cement-based piezoelectric intelligent composite material of the present invention uses cement material as the matrix and piezoelectric material particles as functional materials. After ball milling and mixing, water is added according to a certain water-cement ratio and pressed into shape; electrodes are bonded to both sides of the profile. , applying a certain voltage polarization to produce 0-3 type cement-based piezoelectric intelligent composite materials. The 0-3 type cement-based piezoelectric intelligent composite material prepared by the invention has good compatibility, can significantly reduce the external polarization voltage, and improve the polarization efficiency.

Description

(1) Technical field [0001] The invention relates to a piezoelectric intelligent composite material, in particular to a 0-3 cement-based piezoelectric intelligent composite material and a preparation method thereof. (2) Background technology [0002] Piezoelectric composite material refers to a new material with piezoelectric effect composed of at least one piezoelectric phase material and non-piezoelectric phase material combined in a certain way. According to the connection mode of each phase material, piezoelectric composite materials can generally be divided into ten basic types, namely 0-0, 0-1, 0-2, 0-3, 1-1, 1-2, 1-3, 2-2, 2-3, 3-3 types. The so-called 0-3 cement-based piezoelectric composite material refers to a composite material formed by uniformly dispersing functional body powder with piezoelectric effect in a three-dimensional continuous cement matrix. So far, the development of piezoelectric composite materials is mainly based on polymers, and the research on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B1/00C04B35/00H01L41/00H10N30/853
Inventor 程新黄世峰芦令超常钧刘福田
Owner UNIV OF JINAN